Volume 52, Issue 13 pp. 1898-1904
Article

Fabrication of a nanohybrid of conjugated polymer nanoparticles and graphene oxide for biosensing of trypsin

Jaeguk Noh

Jaeguk Noh

Organic and Optoelectronic Materials Laboratory, Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon, 305-764 Korea

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Byung-Jae Chae

Byung-Jae Chae

Department of Chemistry, Chonbuk National University, Jeonju, 561-756 Korea

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Bon-Cheol Ku

Bon-Cheol Ku

Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Jeonbuk, 565-905 Korea

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Taek Seung Lee

Corresponding Author

Taek Seung Lee

Organic and Optoelectronic Materials Laboratory, Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon, 305-764 Korea

Correspondence to: T. S. Lee (E-mail: [email protected])Search for more papers by this author
First published: 29 April 2014
Citations: 10

ABSTRACT

Conjugated polymers containing triphenylamine group are synthesized via Suzuki coupling polymerization. Fluorescent-conjugated polymer nanoparticles (CPN) are prepared by reprecipitation method using the newly synthesized conjugated polymer. CPN can be encapsulated with polyarginine by electrostatic interaction. The CPN modified with polyarginine exhibit excellent interaction with graphene oxide (GO) which is chemically modified with hydrophilic groups that possesses negative charge, which, in turn, induces the quenching of the fluorescence of CPN upon formation of CPN–GO nanohybrid. Upon exposure to trypsin, the quenched fluorescence is recovered by release of CPN from the nanohybrid, because trypsin cleaves the polyarginine linkage, resulting in weakening of interaction between CPN and GO. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1898–1904

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